Chuck



G` J. EVELO CHUCK Ffled May 28, 1929 2 Sheets-Shee l 1 RJw aan JX/A Ww 1, 7, e L d 4 Y Oct. 13, 1931.

lllll Mau glux Oct. 13, 1931. G, J, EVELO 1,827,387

CHUCK Filed May 28, 1929 2 Sheets-Sheet 2 W ser 37 43 l W #z 47 .3 UV/W @me @Vf/112025 V" m FOUNDRY coMrANjg, or NEW YORK, N gyniconronn'rion or NEW JEnsEz-@g Application led'lll/[ay/QS,

f Thisfinvention relates yto the manufacture of articles having concentric surfaces thereon, :and more particularly to the ymanufacture "of 'Wheels, `such as mine'jor railway carfwheels.

" i j; An obj ect/of this inventionisto improve; the

efficiency ofapparatus usedfor themanufacture of larticles' oiijth'eclassVdescribed'" and fio thereby to. simplify .the process lof manufacv ture.' v j ,v

V Many`articles,suohl`car Wheels, 'forr eX- ample, Ahave `concentricsurfaces which can not be conveniently'produced vWith-fone chucking of the wrkibiank; v'Furthermore,lin-1 the case of cast Wheelsthe treadtakes itsfinal A"form in tlie-moidfandithe center must thenbe *bored* ou'tconcentricWiththe tread. Iny stances of this kindrequirethe eXerciseof considerable 'care' and `accu'racyg'inv setting up =the Work so as to assure that thesurface's Will 20.3

1 the case of Wheels' which are' to v be `'equipped be concentric; yThis is particularly'true" in With roller bearings, as onlyvery smallitoler-V ances f are permitted inv `this class v of fY-Work.

For these reasons, the Vsetting up oi a/Work blank has, heretofore,- been a tedious and diiii' "cult operatiomwhich, due to the time and skill required, hasadded considerable' tothefcost' `or" the finished product. f j `j It also sometimes occurs th'ata b'oring'tool Will yield under the'strainof the cut, andthus deviate from itsr intended path so'astojpro--` duce an irregular or ltaper surface Where 'a' straight cut is `desired.' Diiiiculty has also f been encountered With' Wheels' Which have vrbeen' cored off center, fo r insuchcases the boringtool frequently `i'ollovvs thecore. f

f 1*Itis a more particularobjectof this inven?. tion, therefore, to provide means for readily andlaccurately cutting or'otherwise producingone'surface in concentric relation" to Aanother surface and,"thus, for eXpedifting-and simplifying the manufacture :of articles of the classfdescribed;'y

y'It is' also 'anobj ect ofthisfinventi'on to provide meansjfor maintaining a yboring tool'in its l proper position throughout' the boring .oper-ation.VVV f '1' A still further object is toprovide adevicey capable of accurately centering andholding a Work blank, which devicesh'all'be of simple,

Fig. 41s a ,animee-4er Figegj f :F 5: is "a sectional elevation ofY-theexv8o f section; Y ,v Y

Fig,l 7 i's` alongitudinal" sectional eletration fof'fa borrgiloolfand .1, Y

Fig.- 8A isa sectioni'taken substantially on 90 ltheline'S'-8"ofFil. if. 7; This-invention" con y of an expansible vring which Will yi'eldably Vr'ii'tL asurface of a Work-blank and Will also i fit a suitable'chucklAfWork blank vWith such 95 'Theseyand otherobjectsare effected my do invention, as' Willbe apparent'qfrom 'the vfol- "lowing description and claimstakenin connection With` the; accompanying drawings ly ytormln'g-a -pz u^t 'of this application, in which:

Figure l isajsectional elevation taken sub? 65 i stantially on the -lin'e 1 -1 of Fig. 2i and showi ingfafvvorkY blankin place'on a chuck with 'a boring.`tool inthe 'positionwhich itvvould V'f'occupyjust-previous to beginningfa cut; v ligg 2 isy substantially a'half en d elevation "Tf" of the vWork blank'zandchuck,` a' portion of the Work blank being broken Vaway to s howf'the [position of anexp'ansion ring, this vlieW being Ytaken substantially on the lline 242 of Fig. l;

' Fig., 3 is a sectional elevation showinga 75 Work blank ymount'e'lon ay modified formrof Y 'Sieclo' taken.' substantially `on pansion ring used inconnection `with the @e `sionring usedffin connection -fvvith the appa-' 'v "ratus disclosed 'in'Figs' 3 andlf, the lower-por-l l g tion 'o tthisY expansionbeing 'shovvfnw templates the provisin la ring 'in' place thereonmay be placed. on ha Ychuck Where,"by virtue Of-'the resilienceof the ring, thebla'nk' Will beheld-with sulfi-r -cient firmness to permit vmachining or like operations without `the Laid of other clamp-j fmo ing devices. The apparatus is also, prefera bly, so constructed and arranged that the portion 11 having a bell 12 which -is preferably taper bored at 13 to receive a suitable filler ring 14.

In order that access may readily be had to the interior of the chuck for any purpose, such for example as assisting in thel removal of a work blank, one or `more passages 15 are arranged to extend through the base of the bell 12 at convenient points. vrPreferably, t-hese passages 15 are in the form of radial holesor slots which are equally spaced circumferentially and so arranged as to be diametrically opposite or substantially so.

The filler ring 14; isvpreferably provided on its outer surface with a suitable number of circumferentially spaced axially extending seats 16 which fit the taper bore 13 of the bell 12, and the ring 14 is held in place by a suitable number of lugs 17, which may Ibe, L-shaped as shown, and engage in notches 18 provided at spaced points about the ring for this purpose. The lugs 17 may be secured to the bellportion 12 in any suitable manner, as by being secured inv suitable recesses 13 in the bell bymeans of bolts 19. VThe filler ring is also. notched or otherwise provided .with openings 20 which register with the passages 15 in the bell 12,.

The inner surface of the filler ring 14 is tapered as shown to provide a concentric supporting surface for engaging the outer surface of an expansible and contractible ring 21, the lat-ter being shown more clearly in Fig. 5. This ring-21is provided with a plurality of slots 22 extending transversely of the ring from opposite edges thereof and arranged alternately, as clearly shown in Fig. 5. The inner surface of the ring 21 is concentric .with the outer surface thereof and is also adapted to yieldably fit a concentric surface of a work blank, as for example Ato fit the tread of the car Wheely indicated generally at 23. A ydriving pin 24 is suitably connected to the body portion 11 of the chuck as by beingthreaded thereto, as indicated at26, so

-that'this driving pin may extend between the spokes of the wheel 23 and thus serve as l almeans for imparting rotary motion to the work` blank.

The body portion of the chuck 10 is also l 'provided with an axially extending annular ably made to be a light drive fit in the headstock spindle, as this provides for readily assembling the chuck and for expediting the manufacturing processes. A hardened bushing 28 issecured in the hub portion 27 and extendsbeyond the hub'portion to provide a supporting bearing surface for the pilot portion 29 of the boring bar indicated generally at 30. This boring bar 30 is carried by the tailstock (not shown) and is provided with a suitable boring tool 31.

In carrying out the invention-with the apparatus thus far d-escribed,`the work blank maybe placed on a table or on the floor and the expansion ring 21 placed upon the tread of the wheel 23, after which the work blank with the ring in Vplace thereon is picked up and mounted upon the chuck by pushing axially against the blank so as to press the expansion ring 21 into firm engagement with? thefller ring 14. The inner supporting surface of the filler ring 14, as well as both the inner and outer surfaces of the expansion ring 21, being concentric with the axis of rotation, it is assured that merely mounting the work blank 23 upon the chuck will properly and accurately center the blank and, furthermore, no additional clamping devices are required, nor is anyfinal adjustment necessary as the work blank .is automatically centered and gripped-bythe expansion ring so that work may be begun at once. The work blank may be removed from theA chuck by inserting a bar (not shown) through one of the holes 15, so that the bar will act as a wedge or a pryto force the blank and the expansion ring out of the chuck.

The possibility ofhaving the boring tool follow the core Vof a wheel which has been cored off center is also overcome by providing the boring bar 30 with a long pilot 29 which is, preferably, a good running fit in the extended bushing 28, so that the boring bar will be supported at both ends, and hence, an accurate cutis assured.

Secured to the pilot portion 29 of the boring bar are a plurality of longitudinally extending bearing elements or splines 32 which are preferably dovetailed into circumfergrooves 33 in the pilot portion 29, and the splines 32 are held from axial movement by a cap` 3st which is: threaded or otherwise secured tothe reduced end 3G of the pilot portion 29; the cap being arranged to abut the adjacent ends of the splines ,and hold them securelyV in place Vwith their remote ends abutting the closed ends of their-respective retaining slots 33. As will be apparent these bearing elements 32 may be easily and quickly removed forreplacement when necessary.

With the form of work blank such as that shown in Figs. 1 and 3, it will be apparent that it would be very difficult, and in fact not` practical, to attempt to bore out the hub "rem-,asv

e prtion* of :the bl'anki from one*` end, as'V some of the"interiorv annular?ribifportions'jwvouldj prevent theoperatorfromseeing Whathelwas een doing. Itvvill-'alsobe obvious vthat vwith they lapparatus,-disclosedfin Figs. EL andi-2 the end portion of the hub of the blank mayberreadily kbore'd and faced. 'TheH completion ffof'thijs operation, therefore, gives the blank affinished surface concyent'ric with n the .tread 'and .it jWill bevseen that," if*y this;y nf'evvlyfy finished 'surface is accurately mountedfiupo'n.achuck, rthe'.remainderiof the bormgfanay befvdone outerv endportionlof the 4hub ofthe'fblank vis This form of chuck comprisesa body -portion 38 havin-g an axially eXtendinghub-por- Y-tion orVv :bushing 39( which',` vlike f .the f .annular Ahub portion.27.ofthechuckshown in Fig. l, ispreferably a light fdrive.itfin.the headstock Spindle of a lathe., ..;Th'e-body portionv 38is also bored `concentrically fand provided' with i aihardened bushing k41 Which. is preferably *.driven fit inthe body .portion 38;'A j The bush-` .ing 41` extends axially-beyond. the 'body portion 380i? the'chuckto-*fprovideanextended [bearing surface `for the pilotpo'rtion 29 of the boring bar, as .explainedfin connection with] Figs. 1 andf2. f-

Y In this modiiiication, hovveventhe.extend- 4ingportion of the bushing 4lalso carries the viiller ring 42,ythefglatter. being preferably taper turned and taper bored to lita correspondinglyf'tapered exterior .surface on, the

extending portion Aof thefbushing, andthe f11errin'g:is.in this instancegsecured tothe 4bushingv by means of a suitable numberr of circumferentially spaced set .screws 4.` An expansion ring 44, as more clearly shovv'nvin Y Fig. 6, is provided with an interior surface which *isl tapered toI fit the outer tapered; su-r- .fU-,face of the filler ring 42 and, as Withjthe .ring

21 shown in Fig. 5, this ring 44 shownuin Fig. f

6 is also provided with a; plurality-.hof slots 45 extending alternately from 'thejopposite edges thereof. The outer surfaceof the ring 44 is not tapered, however', but is straight to fit the straight bore of the hub portion of the Work blank, and the ring 44 is also preferably provided with 'a radially 'extendingflange 46 Which is adapted to engagethe facedend of the hub of the'vvork blank. While the driving pin 47 may,y if desirechbe carried by thef body member 38 of the chuck, this driving pin 47 is, preferably, carried by the facev plate 50 of a lathe, being' suitably connected,

thereto by means of bolts indicated at 48.

The method of mounting,l the work blank y{thechuck; f. A Y K Y By providinga series of fillerrings, n n .of Whichy isi-adapted to yfity one -chuck,'but` `onI the chuck Bfisingeneralthesame as that 4"described yvith. reference (to fFigJA 1, the e'X`- vpfansible ring "44ebeing placed in the previous` ily bored portion of the hubfof the Wheel 23k and thenpushedontothe 'lfiller'ring 42%o`fthe vSchuck 37. v f' While the" Work blank.' maya` be Imanuzrlly Apushed `into the chuck, it is? more lconvenient'to place a bar such asthebarf49, acro'ss thehubV portionof theblank andfthen `'toforcethefpilotportion of thefboring bar against thebar- .49 by advancing thetailstock.

'If desired,a suitable recess 4,9l may beprofvided in' thel bar 49to receive the endofjthe .pilot 29 to prevent slipping: This` is an oper- "f ation: Which can readily be :performed andy Whichyat'thefsame time,l assures that sufficient blank to cause (it: to be rfirmly gripped by `the expausible ring 44. While this 'methodlo f mountingl they IWork blank by placingfa bar` such as the bar 49 acrossltheopeningi in the hubfandfthen advancing the tailstockfagainst this bar 'Was not describedv in connection Withy Figs.' *l and 2,'f1it Will be i obviousthat l this method may be employedV Withf either,v form '1 f Once 'then Work blank mounted upon ythe chuckfvvith the z,driving pin beypressure 'will be leXer-ted--` againstthefulvvork of chuck-Whenever conditions render-this den sirable. It Willa-lso be obvious that in some cases the .bar 49 y'may bef dispensed With and a I suitable' abutment provided on theT tailtvveen 'ftheA spokes or otherwise1engaging the Work blank 'in' a manner'ftobe capable of `riin- "parting' rotaryfmotion thereto, 'the-"bar, 491is 'removed and the boring-:operations Lareproe ceeded With as usual. `It Willi also beob'- v served that' with this ymodification` of the" in vention the pilot 29 of the boringbar issupported in .the bushing" '41 and thus the boring barl is supported atA both ends :and again itis assured that the" hubs will be accuratelyV bored. l

' -Inf order' tof provide forfreadily removing f the Work blank'fromf th'echuck after the ma#4 i chining 'or other operations f have'y been conV '-`ple'ted,a'nut 'lfis threadedA upon the body v of the chuck, as indicat'edjat 52, and arranged soy that las the-nut l-i's advanced it'Willenga-ge thelflange46 of the expansibl'e` ring 44 and r thus force the ring and the lWork blank 23 off'fromrthe (3l/luck.V V'In orderthatv this may be accomplished '.W'ith a lminimum, Tof effort on the part .of theloperatorfthe n-utfl,v is :pro-

videdv 4with a suitable number offradiallyex tending holespjwhich are adapted to re` ceive'the Vend of the :bar orfother.`i instrument `'capable of actingv as a leverfso` that by .in-A serting suchalever into one ofthe holes 53 considerable 'forcecan easilybeeXerted upon 'the nutfl tocausethe same to force theekpension ringr44A andthe Work blank 23ff-ro'm each which is alsoadapted Ato receive an expansion ring capable of J.holdingadifferent size yof blank, it Lis'possi-ble Witheach form-of the' invention disclosed to use the same chuck for vholding several ldifferentsizes fof blanks. To

effect such a ychan-ge in the capacity of the Achuck shoWn .in Fig. l, it isnierely neces- 4the set screws Llli-:and replacing the filler ring 42 With similar ring having' the proper out- `side diameter. In this Way it is possible to provide for :accurately chucking and boring blanks of different sizes Wit-houtproviding a r'corresponding number of chucks, many of which would be idle most ofthe time. It will also be apparent, however, lthat when the blanks are all of the same size, the filler ring may be dispensed With and the expansion `ring made to fit directly on the chuck body.

Furthermore, it Will readily be -seen that a blank is automatically centered and chucked y by 'the mere act of bringing the expansion `ring 'to its sea-t `upon the liller ring. No clamping or final adjustment is necessary-and this alone makes possible areduction inthe 4piece Work price, increases production and .ing a-lso prolongs the life of Wheels to some extent. Y

`lZVhile 'some of the preferred forms .of this invention, together with preferred modesof practicing the' same, :have been `shown and described, it will be obvious that various .mod- 4ifications will Voccur to those skilled inthe art ,to Which the 4invention app'ertains, and it will be Aunderstood -that various-changes maybe made without departing from the :scope thereof, :andlthat the invention is not limitedfexcept :as indicated bythe appended claims. v

What is claimed is:

1. In a chuck for holding a Wheel, the combination of a body .member having aniaxially extending, annular hub portionadapted to -be `connected With a rotatable lathe part,

2. :The combination set forth in 'claimV 1 wherein a bushing is concentrically disposed in the body member and extends into the `annular hub portion thereof to provide an lintended bearing for the pilot of a boring ar.

3. In a lathe, a chuck for holding a Wheel, the combination of a body member adapted for connection With a driving member, means providing a concentric supporting surface on the body member, an :eXpansible :and con-tractible ring having concentric surfacesadapted to yieldably engage the supporting surface of the body member andthe perimeter of the Wheel, respectively, for holding the Work blank, and a drive' bar connected to the body member and :co'acting With the Wheel for transmitting rotary motion from the driving Amember to `the Wheel. 4. In a lathe, a chuck for holding a VWheel and adapted to be connected to the lathe headstoc'k, a boring .bar ladapted 'to be carried by the lathe tailstock, :and means for effecting boring of the Whe'elihu'b concentric to the perimeter of the Wheel comprising a pilot portion on the boring bar, a plurality of y'bearing elements on the pilot portion, a ycap on the pilot portion for retaining vsaid vbearing elements in position, and :a guiding bearingin the `chuck concentric with the axis of rotation of thelatterinto Whichv the pilotV portion vof the boringbarextends fand With which said bearing -elements `contact during relative movement between said boring bar and chuck.

5. In a chuck for holding :a Wheel, arecessed body member having :an axially .eX- tending hub for attachment to la rotatable lathe part, fattachable means providing a supporting surface Within the recess in said body member, a resilient member fitting the supporting surface and `the perimeter of a Wheel for supporting the Wheel for rotation With'the chuck, and a tubular guide element secured to the hub Aat the axis of rotation `4thereof and projecting into the recess in the body member for receiving Vand guiding a lathe part.V

In witness whereof I have hereunto set my hand.

' GEORGE J. EVELO.

means providing a supportingsurface Aon the body member concentricto the naxis of rota- 'tion of therota'table lathe part, a resilient ring having concentric surfaces adapted to Vyieldably v.fit the Vsupporting surface of the body member and a surface of the wheel, respectively, and tubular means concentrically '-.disposed `in the Vbody-member 'for receiving the pilot portion of aboring bar whereby 

